Hierarchy- Any system of persons or things ranked one above the other.

Hieroglyph - a hieroglyphic symbol. Hieroglyphic writing. A figure or symbol with a hidden message.
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Hohokum - Hohokam- literally means those who came before.
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a hohokam cave dwelling

Horticultrure - the science and art of cultivating plants.

Hypothesis- prediction or problem that can be tested by further investigation.
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Hysteria (medical) -an uncontrollable outburst of emotion or fear, often characterized by irrationality, laughter, weeping, etc.
- a psychoneurotic disorder characterized by violent emotional outbreaks, disturbances of sensory and motor functions, and various abnormal effects due to autosuggestion.